How to keep OD hidden under a browsers window?

Hi,

I've just started playing around with this great tool. There's one thing I cannot set up properly.

I want ObjectDock only to work on my desktop. I mean - if I open a FireFox window maximized, and when I point a coursor on the top of the screen (a gesture which would normally open ObjectDock) I don't want it to show up. Becouse it does show up - I open random programs placed on my OD very often when I just want to minimize a FireFox window, or something like that.

This is probably something obvious, but I really can not find a solution.

Thanks.